Monastery Mentor is a mythic Creature — Human Monk card from Double Masters 2022 (2X2), collector number 21. Current market price: $1.86 (foil $3.20), TCGplayer market prices via Scryfall.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Whenever you cast a noncreature spell, create a 1/1 white Monk creature token with prowess.